Investigation of the effect of industrial ball mill liner type on their comminution mechanism using DEM

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Kolahi Sajad; Jahani Chegeni Mohammad; SEIFPANAHI SHABANI KUMARS

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Journal Paper

Paper Information

Journal: International Journal of Mining and Geo-Engineering Year:2021 | Volume:55 | Issue:2 Page(s): 97-107

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Title

Investigation of the effect of industrial ball mill liner type on their comminution mechanism using DEM

Author(s)

Kolahi Sajad | Jahani Chegeni Mohammad | SEIFPANAHI SHABANI KUMARS | Issue Writer Certificate

Keywords

DEM simulation

Industrial ball mills

Liner type

Head height

Impact zone length

Abstract

The mill shell Liner type, rotation speed and the amount of its loading are the key factors influencing the charging behavior, consequently the comminution mechanism. In this paper, the milling operation of Industrial ball mills using the Discrete Element Method (DEM) is investigated. First, an industrial scale ball mill with a Smooth Liner type is simulated. Then, by changing Liner type, i. e. Wave, Rib, Ship-lap, Lorain, Osborn, and Step liners, six other independent simulations are performed. Effects of mill shell Liner type on charge shoulder, toe, impact, and head points, also on Head height and Impact zone length as well as on the creation of cascading, cataracting, and centrifuging motions for balls at two different mill speeds, i. e. 70% and 80% of its critical speed (NC) are evaluated. Also, in order to validate simulation results, a laboratory-scale mill is simulated. The results indicate that the charge heads are respectively about 240. 13, 283. 40, 306. 47, 278. 12, 274. 42, 274. 42, and 278. 12 cm at the simulations performed with Smooth, Wave, Rib, Ship-lap, Lorain, Osborn, and Step liners at 70% of NC. The corresponding values at 80% of NC are as follows: 256. 08, 264. 56, 313. 54, 298. 45, 313. 54, 311. 60, and 283. 40 cm. On the other hand, the Impact zone lengths are respectively about 33. 14, 22. 11, 38. 63, 35. 86, 38. 63, 38. 63, and 49. 59 cm at the simulations performed with the above-mentioned liners at 70% of NC. The corresponding values for Impact zone lengths at 80% of NC are as follows: 35. 86, 27. 63, 49. 59, 38. 63, 33. 14, 52. 32, and 41. 38 cm. Comparison of the simulations related to the laboratory scale mill with experimental results demonstrates a good agreement that validates the DEM simulations and the software used.

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APA: Copy

Kolahi, Sajad, Jahani Chegeni, Mohammad, & SEIFPANAHI SHABANI, KUMARS. (2021). Investigation of the effect of industrial ball mill liner type on their comminution mechanism using DEM. INTERNATIONAL JOURNAL OF MINING AND GEO-ENGINEERING, 55(2), 97-107. SID. https://sid.ir/paper/990753/en

Vancouver: Copy

Kolahi Sajad, Jahani Chegeni Mohammad, SEIFPANAHI SHABANI KUMARS. Investigation of the effect of industrial ball mill liner type on their comminution mechanism using DEM. INTERNATIONAL JOURNAL OF MINING AND GEO-ENGINEERING[Internet]. 2021;55(2):97-107. Available from: https://sid.ir/paper/990753/en

IEEE: Copy

Sajad Kolahi, Mohammad Jahani Chegeni, and KUMARS SEIFPANAHI SHABANI, “Investigation of the effect of industrial ball mill liner type on their comminution mechanism using DEM,” INTERNATIONAL JOURNAL OF MINING AND GEO-ENGINEERING, vol. 55, no. 2, pp. 97–107, 2021, [Online]. Available: https://sid.ir/paper/990753/en

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